gilliland



. 3 Sheets--Sheet 1. E. T. 85 J. P. GILLILAND. Magneto-Eleotrib Genera/p013. No. 231,790.

Patented Aug. 31,1880.

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WITNESSES.

,4 PETERS, FHOTO-LIT KYRA 3 SheetsShe et 2. E. T. 8: J. F.,GILLILAND. Magneto-Electric Generator. No. 231,790.

Patented Aug. 31,1880.

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I P R I if j N. PETERS, PHOTO-L THOGRAF'H UNITED STATES PATENT Erica.

EZRA T. GILLILAND AND JAMES F. GILLILAND, OF INDIANAPOLIS, INDIANA, ASSIGNORS TO THE GILLILAND ELECTRIC MANUFACTURING COMPANY,

OF SAME PLACE.

MAGNETO-ELECTRIC GENERATOR.

SPECIFICATION forming part of Letters Patent No. 231,790, dated August 31, 1880.

Application filed February 21, 1880.

To all whom it may concern:

Be it known that we, EZRA T. GILLILAND and JAMES F. GILLILAND, of the city of Indianapolis, county of Marion, and State of Indiana, have invented certain new and useful Improvements in Magneto-Electric Generators,,of which the following is a specification.

The object of our invention is to improve the construction, and consequently increase the to efficiency, of magneto-electric generators; and

it consists in the construction and arrangement of parts hereinafter more fully specified. teferring to the accompanying drawings, which are made a part hereof, Figure l is a r 5 front elevation of our improved generator. Fig. 2 is a side elevation, the surrounding box being broken away to show the operating parts. Fig. 3 is a longitudinal vertical section on the dotted line 00 00. Fig. at is an underside plan or bottom view of the cylinder and adjacent parts. Fig. 5 is a transverse vertical section on the dotted line 3 y. Fig. 6 is a transverse vertical section on the dotted linezz; and Fig. 7 is a view of the wheel F after the parts are placed together, but before they are riveted.

In said drawings, the portions marked A represent the magnets; B, pole-pieces constructed to form the sides of a cylinder; C, studs or bars of suitable formation connecto ing the polepieces together, and with them forming an open-sided but rigidly-constructed cylinder; D, a revolving armature; E, heads for the cylinder, which also serve as bearings for the armature-sh aft F, a friction gear-wheel 5 of peculiar construction upon one end of the armature-shaft; G, a wheel which engages with and drives the wheel F; H, a shaft to the wheel G; I, a bearing, (mounted in the side of the supporting box or frame-work Z,) in which 0 the shaft H runs; and J, a crank on the shaft H, by which it is driven.

The style of the magnets which we prefer to use is the ordinary horseshoe form, and we prefer to fasten them to the pole-pieces by machine-screws A, as shown in several of the views of drawings, but most clearly illustrated in Fig. 6.

The pole-pieces B are necessarily of iron or other analogous magnetic substance, and the bars C and heads E of brass or other non magnetic material.

The bars C and pole-pieces B are formed and attached as follows: The pole-pieces are bored for the reception of the ends of the bars and countersunk on the side from which the bars are to enter in the form shown. The studs, having been previously prepared by turning down the ends, thus forming square shoulders, are inserted in the holes thus formed. The reduced end and the hole are of corresponding size, and consequently tit closely to gcther, and for the same reason the shoulder fits closely into the countersink. A double bearing is thus formed, which adds considerably to the firmness ot' the structure. The countersinksand shoulders all being bored and turned to gage insures perfect accuracy of fitting and an interchangeability of similar parts. After the studs and pole'pieces are placed together they are so secured by riveting the former upon the latter. Buta small amount of brass is used in this construction; consequently a considerable saving in cost is eifected as compared with a solid cylinder.

The armature is similar in all respects to that shown in an application for Letters Patent which was filed by one of us, the said Ezra T. Gilliland, on or about July S, 1879, as are also the cylinder-heads forming the armatureshaft bearings.

The wheel F is formed of a hub, f, two disks, f f, and preferably a washer, f interposed between said disks.

The disks f f are preferably stamped from thin sheet-steel, with the outer edges turned outwardly, as shown, and a central orifice to allow of their being placed on the hub. A small projection, 6, (see Fig. 7,) is nsuallyleft in this orifice, which enters into a corresponding'groove in the hub and prevents the disks from turning thereon.

The washers f are usually somewhat thinner than the wheel G, so that when the latter enters the space between the two disks f f it will spring them slightly apart. This occa sions considerable friction, which prevents the wheels from slipping, and is sufficient to cause the drive-wheel to maintain motion in the driven wheel notwithstanding the retarding force of the magnets.

Besides being a very desirable form of gearing, because of its cheapness, simplicity, effectiveness, and durability, these wheels F and G afford an important advantage over others, by reason of the fact that the driven wheel may be much smaller than in any other construction of which we have any knowledge, an d thus a greater speed be obtained without increasing the size of the drive-wheel beyond convenient limits. This is important, because a high degree of speed increases the effectiveness of the generator.

Another advantage of this form of gearing, resultant upon the cohesive force being applied entirely to the sides and not to the edges of the wheels composing it, is that there is little or no forcible pressure upon the shafthearings; consequently the machine runs more easily and will wear more evenly and last longer than when the force is differently applied.

A still further advantage is, that the bearing of the drive-wheel shaft may be attached to the side of the box or frame.

Heretofore it has been necessary to have a rigid metal connection between the two shaftbearin gs in order to secure an unvarying pressure between the two wheels. The present construction permits the distance between the wheel-shafts to vary somewhat without destroyin g the effectiveness of the wheel-con tact.

The method of fastening the magnets A to the pole-pieces B is very simple and economical, and one which allows the magnets to be brought very closely together, thus allowing the machine to be broughtinto a comparatively small compass.

In the drawings three magnets are shown, which are securely held by two screws to each pole-piece. In the present construction the outer ones are further prevented from slipping from the pole-pieces by the cylinder-heads E, which overlap them, as shown in Figs. 2 and 4.

Having thus fully described our said invention, what we claim as new, and desire to secure by Letters Patent, is

1. In combination with the rotary armature of a magneto-electric generator, a friction-gearing consisting of one wheel consisting, essentially, of two sheet-n1etal disks secured together in the center, and a second wheel consisting of a single disk, the edge of which en ters between the edges of the two disks of the first wheel and is clamped by the spring force thereof, said disks being all in parallel planes, so that the distance between their axes may vary somewhat without essentially changing the character of the wheel-contact, and also so that the wheel-contact shall occasion no forcible pressure upon the axle-bearings of said wheels, all substantially as herein shown and specified.

2. As a part of a friction-gearin g, as specified, a wheel. F, constructed of a hub, f, having a groove, two disks, f f, one or both of which shall have a projection to fit the groove, and a washer, f all secured together in the manner shown, and operatingsubstantially as set forth.

3. 1n the cylinder of a magneto-electric generator, the combination of pole-pieces having countersunk openings to receive the ends of studs which serve to connect said pole-pieces together with said studs, which have shoulders turned thereon to fit into said countersunk openings, all substantially as shown and described, and for the purpose set forth.

4. The cylinder of a magneto-electric generator, composed of pole-pieces B B, studs 0 0, having shoulders thereon, and which form the sole means of securing said pole-pieces in posi v tion, and appropriate cylinder-heads, all substantially as shown and described, and for the purposes specified.

5. The combination, with the-magnets A A and polepieces B B, of the cylinder-heads E E, having projecting edges, and the screws A A, which pass between said magnets and enter said pole-pieces, thus securing said magnets and said pole-pieces directly together by means of enlarged heads or washers which overlap the edges of the magnets and, with the aid of the projecting edges of the cylinder-heads, secure said magnets firmly to said pole-pieces, substantially as set forth.

In witness whereof we have hereunto set our hands and seals at Indianapolis,Indiana, this 18th day of February, A. D. 1880.

EZRA T. GILLILAND. [L. s.] JAMES F. GILLILAND. [L. s.] In presence o f O. BRADFORD, WlLL E. MOORE. 

